/* ============================================================
   COMPONENTS — Buttons, Cards, Badges, Tags, Inputs
   ============================================================ */

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  letter-spacing: -0.01em;
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background-color var(--duration-fast) var(--ease-default),
    color var(--duration-fast) var(--ease-default),
    transform var(--duration-fast) var(--ease-spring),
    box-shadow var(--duration-fast) var(--ease-default),
    border-color var(--duration-fast) var(--ease-default);
  text-decoration: none;
  border: 1.5px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn:active { transform: scale(0.97); }

/* Primary */
.btn--primary {
  background-color: var(--color-text-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-text-primary);
}

.btn--primary:hover {
  background-color: #1a1a1a;
  box-shadow: var(--shadow-md);
}

/* Secondary */
.btn--secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-text-primary);
}

.btn--secondary:hover {
  background-color: var(--color-text-primary);
  color: var(--color-text-inverse);
}

/* Ghost */
.btn--ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

.btn--ghost:hover {
  background-color: var(--color-hover-bg);
  color: var(--color-text-primary);
  border-color: var(--color-border-strong);
}

/* Large */
.btn--lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-md);
}

/* Small */
.btn--sm {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
}

/* Icon arrow */
.btn__arrow {
  display: inline-flex;
  align-items: center;
  transition: transform var(--duration-base) var(--ease-spring);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* Text link button */
.btn--link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-decoration: none;
  position: relative;
}

.btn--link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-text-primary);
  transition: width var(--duration-base) var(--ease-default);
}

.btn--link:hover::after { width: 100%; }
.btn--link:hover .btn__arrow { transform: translateX(4px); }

/* ── Tags / Badges ───────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  background: transparent;
  transition: all var(--duration-fast);
}

.tag:hover {
  background: var(--color-hover-bg);
  color: var(--color-text-primary);
}

/* ── Project Cards ───────────────────────────────────────── */
.project-card {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  background: var(--color-bg-primary);
  transition:
    transform var(--duration-slow) var(--ease-spring),
    box-shadow var(--duration-slow) var(--ease-default),
    border-color var(--duration-base) var(--ease-default);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-border-strong);
}

.project-card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slower) var(--ease-smooth);
}

.project-card:hover .project-card__image img {
  transform: scale(1.03);
}

.project-card__body {
  padding: var(--space-8);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.project-card__title {
  font-size: clamp(1.2rem, 2vw, var(--text-2xl));
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-3);
  line-height: 1.25;
}

.project-card__desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  flex: 1;
}

.project-card__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-top: auto;
  transition: gap var(--duration-base) var(--ease-spring);
}

.project-card:hover .project-card__cta {
  gap: var(--space-3);
}

.project-card__cta-arrow {
  transition: transform var(--duration-base) var(--ease-spring);
}

.project-card:hover .project-card__cta-arrow {
  transform: translateX(4px);
}

/* Featured card (large) */
.project-card--featured {
  grid-column: span 8;
}

.project-card--featured .project-card__image {
  aspect-ratio: 16 / 9;
}

.project-card--sm {
  grid-column: span 4;
}

/* ── Stat Cards ──────────────────────────────────────────── */
.stat-card {
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-bg-primary);
}

.stat-card__number {
  font-size: clamp(3rem, 5vw, 5rem);
  font-weight: var(--weight-black);
  letter-spacing: -0.05em;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-card__label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: var(--weight-medium);
}

/* ── Skill Tags ──────────────────────────────────────────── */
.skill-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  transition: all var(--duration-fast);
}

.skill-tag:hover {
  background: var(--color-text-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-text-primary);
}

/* ── Section Header ──────────────────────────────────────── */
.section-header {
  margin-bottom: var(--space-16);
}

.section-header--centered {
  text-align: center;
  max-width: 700px;
  margin-inline: auto;
  margin-bottom: var(--space-16);
}

.section-header__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.section-header__title {
  margin-bottom: var(--space-6);
}

.section-header__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 52ch;
}

/* ── Form Inputs ─────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-family: var(--font-primary);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  outline: none;
  transition:
    border-color var(--duration-fast) var(--ease-default),
    box-shadow var(--duration-fast) var(--ease-default);
  line-height: var(--leading-normal);
  appearance: none;
  -webkit-appearance: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-text-primary);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
}

.form-input:user-valid,
.form-textarea:user-valid {
  border-color: var(--color-border-strong);
}

.form-input:user-invalid,
.form-textarea:user-invalid {
  border-color: #999;
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

/* ── Horizontal Rule ─────────────────────────────────────── */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: 0;
}

/* ── Tooltip-like caption ────────────────────────────────── */
.img-caption {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-3);
  letter-spacing: 0.01em;
}